Which of these is an effective way of guiding, modifying, and disciplining a child?
a. gerard praises the child even when he makes a mistake.
b. sean sets clear and consistent rules.
c. brad punishes the child for every mistake she makes.
d. stephen rewards his child with expensive gifts.

Nextdoor is an instant messaging application for smartphones. new smartphone users find it easier to connect with friends and relatives through this mobile app when compared to other similar instant messaging applications. hence, it has the largest user base in the industry. thus, nextdoor app's value has increased primarily due to itsa. learning curve effects. b. economies of scale. c. economies of scope. d. network effects.